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ARA_FR42G4
28
000235
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FCDhoFanAnttbeCrlooWmpooadnry
ARRRG _ 342k
Chambers Works PFOA Recycle
Prior to start-upofthe PFOA Recycle process, baseline blood samples were collected on `fwuotrukreerssawmhploiwnoguclodubledabesscoimgpnaerteoddthteo rtehecybcalseeplrinoecelesvsealsn.diBtlsosoudppmoorntiotpoerriantgioinsscsonodtuhcatted
as an industrial hygiene tool to evaluate the effectivenessofthe controls. Baseline samples of 42 workers were collected in 1999. Samples were analyzed as whole blood for PFOA by a contract laboratory `using gas chromatography with electron capture detector. This laboratory had been analyzing blood. samples for Washington Works for
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sampling was conducted in 2000 which included 30 people from the original 1999 group `and 34 newly assigned workers. DuPont analytical chemists found that in both the1999 `and2000 bloodmonitoringcampaigns, thelowestcalisb tanrdaa rdutseidbo ythne lab `was 100 ppb. PFOA was detected in many ofthe Chambers Works samples, but it could
tnhoet1b9e9r9ealniadbl2y0q0u0anbtliofoieddmaotnciotnocreinntgractaimonpsailgesnsssthhaonw1e0d0rpespubl.tsA<l1lo0f0tphpeb.samples in both
`This experience led DuPont to work with a different contract analytical laboratory on another method thatwouldbemore sensitive andprovide mores.cientificallyaccurateand reliabledataatthe low levelsinwhichwewereinterested.
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December, 004
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Barbar. Davin,CI,CSP 000236
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